How has this not happened sooner? Jennifer Grey has joined the cast of Grey's Anatomy, E! News can confirm. Grey will appear in a multi-episode arc during the hit medical drama's current season 15. Details about her arc, and whether or not she'll have some connection to the titular character, Meredith Grey (Ellen Pompeo) are being kept under wraps. It's unlikely she's playing herself at a Grey family reunion, but we can dream… Perhaps she's a patient at the hospital? Or a relative of a cast member? Camilla Luddington's mom, anybody?. Grey's father, Joel Grey, appeared in a season six episode of Grey's Anatomy. Other guest stars during season 15 include Josh Radnor, Debra...

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